Awhile back I watched John McCain ramble on a fair bit of nonsense as he struggled with understanding James Comey's responses in regards to the memos--but that was most likely because he was diagnosed with brain cancer shortly after. Of course you're going to be slightly incoherent, not to mention the guy is 80 years old.

After undergoing some treatment and an operation for the brain tumour, he leaves the hospital to go to the senate to cast his vote for repealing obamacare (huge scar above his left eye). Instead of saying 'yes' or 'no', he walked up being last, stuck a big thumbs down in front of Mitch McConnell and walked off.

That's from a guy whose been beaten to a pulp in Vietnam and now fighting a brain tumour, meanwhile Trump doesn't know the definition of pain. Trump's now fuming that McCain vetoed the repeal.